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Minchanka [31]
3 years ago
8

How many countries are there total

Geography
2 answers:
Gemiola [76]3 years ago
7 0
There are 196 countries
olga55 [171]3 years ago
5 0
There are 196 countries in the world today
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When analyzing the speeds of stars far from the galactic center, the orbital speeds of stars ___________ as distance increases f
KiRa [710]

Answer: is constant

Explanation:

In order to analyze the velocity of the stars within a galaxy, the <u>galaxy rotation curves</u> (developed by the American astronomer Vera Rubin) are used. These graphs are elaborated as a scatter diagram in which the orbital velocity of the stars present in a galaxy is represented on the Y axis and the distance of these stars to the center of the galaxy on the X axis.

Thanks to this diagram, it has been possible to observe a characteristic behavior in the rotation speed of the stars (and gas) present in the galaxies, which differs from the rules of the orbital movement of the planetary systems postulated by Newton and Kepler.

This means that in these galaxy rotation curves it has been observed that the rotation speed of stars and gas is "constant", regardless of the distance to the center of the galaxy. This discrepancy and these results were then used to demonstrate the existence of dark matter in the universe.

6 0
4 years ago
Jeremy hears on the news that los angeles has had a devastating earthquake. he believes that the residents were being punished f
olya-2409 [2.1K]

Jeremy hears on the news that Los Angeles has had a devastating earthquake. he believes that the residents were being punished for leading sinful lives. this best illustrates the just-world phenomenon.

Seismic vibrations can cause ground movements and surface cracks. Surface cracks can cause damage to roads and buildings as well as other hazards. In this example, a paved road has surface damage with large cracks and collapses.

No, there will be no devastating earthquakes of magnitude 10 or greater. The magnitude of an earthquake depends on the length of the fault on which it occurs. In other words, the longer the disturbance, the bigger the earthquake.

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4 0
2 years ago
How are S waves and surface waves similar
yanalaym [24]

Answer: Body waves travel through earths interior while surface waves travel along the earths surface. Body waves travel more rapidly than surface waves.

Explanation:

3 0
3 years ago
Inside earth a n forms due to the diffrent temperatures of the core?
natali 33 [55]

Question: inside earth a forms due to the different temperatures of the core?

Answer: convection cell

Explanation: a  convection cell cools and heats up fluid so it does this in the earths core

question answered by

(jacemorris04)

6 0
3 years ago
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Geometry
castortr0y [4]

Answer:

yes

Explanation:

7 0
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